Each cell in a GridBinaryImageColumn contains an image streamed from a
binary image source field (specified through the DataField property of
the column). When used, this column will show a RadBinaryImage control
in view mode and RadUpload or RadAsyncUpload in edit mode to upload an
image. The type of upload is determined by the UploadControlType
property. Additionally, you can persist the binary data when an item
is opened for edit by setting the PersistBinaryDataOnEdit property to
true. This will force the control to pass the old binary image to the
data source so it could be persisted and not deleted.